<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script src="../../scripts/jquery.js" type="text/javascript"></script>
<style>
#XY{
	width:40px;
	height:100px;
	background:#aaa;
}
</style>
</head>
<body>

<div id="XY" class="box"></div>

<script>
$(document).ready(function() {  
    $("#XY").mousedown(function(e){
		alert(e.which)  // 1 = 鼠标左键 ; 2 = 鼠标中键; 3 = 鼠标右键
	})
});

</script>
</body>
</html>